JPS5926545Y2 - Connector plug for coaxial cable - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connector plug used for, for example, connecting coaxial cables for television.

Generally, the frequency of signals transmitted by television coaxial cables is extremely high, so the connectors used to connect coaxial cables have a complicated structure.

Further, since parasitic impedance does not occur at the joints of the coaxial cables, the coaxial cables must be connected to each other reliably and firmly, and it is also undesirable for the connection state to change over time.

FIG. 1 shows a conventional connector of this type.

Figure a is a front view shown in cross section at the center, and figure b is a side view.

In the figure, 10 is a connector plug body, 11 is a connecting nut having a female thread, and 12 is a shell having a through hole, one end of which is fitted into the nut 11, and the other end is inserted into a crimp ring 13.

To attach a coaxial cable to the connector plug 10 configured as described above, a coaxial cable (not shown) with the center conductor exposed and the outer sheath stripped to the necessary extent is inserted into the shell 12 from the right side of the figure. Insert into the through hole.

Next, the crimping ring 13 is fitted onto the shell 12 and crimped with a jig.

At this time, the outer conductor of the coaxial cable is in contact with the inner wall of the through hole of the shell 12, so if the nut 11 is screwed into the male screw (not shown) of the connector to be connected, the external conductor of the earth circuit etc. A conductor connection circuit is formed.

Further, the center conductor of the cable is also inserted into the conductive part provided inside the male screw on the side to be connected, and a connection circuit of the center conductor is formed.

However, in such a connector plug,
The coaxial cable is simply crimped with the crimp ring 13.
The mechanical strength of the connection between the coaxial cable and shell 12 is insufficient.

For this reason, the force that resists the rotation or tension of the coaxial cable is weak, so the coaxial cable becomes loose or easily pulled out after crimping, and the connection condition deteriorates both electrically and mechanically after long-term use. be.

The present invention was developed to solve the above-mentioned conventional drawbacks, and provides a connector plug that has high attachment strength between the coaxial cable and the connector plug and can withstand long-term use. .

The present invention will be explained below with reference to the drawings.

Fig. 2a is a front view of the embodiment of the present invention shown in half section, b is a side view thereof, Fig. 3 is a central sectional view showing a state in which a coaxial cable is attached, and Fig. 4 is an AA sectional view thereof. .

In the figure, 20 is the main body of the connector plug, and 21 is a nut.

22 is a metal cylindrical conductor, which includes a flange 23 and a large diameter portion 2.
4 and a small diameter portion 25, and the flange 23 is fixed inside the nut 21.

A spiral uneven portion 26 is provided on the outer periphery of the small diameter portion 25 of the conductor 22 .

Reference numeral 27 denotes a cylindrical presser fitting having a through hole of approximately the same size as the large diameter portion of the conductor 22, one end of which is inserted between the nut 21 and the conductor 22, and is configured as a three-piece unit. A large number of concave and convex portions 28 are formed inside the other end of the presser metal fitting 27.

Note that it is desirable that the convex portions of the concave and convex portions 26 and 28 be formed in an acute angle shape.

Coaxial cable 30 connected to this connector plug 20
For example, as shown in FIG. 5, an insulator 32, an outer conductor 33, and a jacket 34 are arranged concentrically around a center conductor 31.

To attach the coaxial cable 30 to the connector plug 20 configured as described above, first, the center conductor 31 is exposed for the required length, and the insulator 32, the outer conductor 33, and the outer sheath 3 are assembled.
4 are cut to a size that matches the conductor 22 and the holding fitting 27, respectively.

The coaxial cable 30 that has been pretreated in this way is inserted into the connector plug body 20 from the right side.

In this case, the small diameter portion 25 of the conductor 22 is connected to the coaxial cable 30.
The coaxial cable 30 or the connector plug body 20 is rotated so that it enters between the insulator 32 and the outer conductor 33.

As a result, the inner circumferential surface of the jacket 34 of the coaxial cable 30 moves forward while engaging with the spiral unevenness 26 provided on the outer circumferential surface of the conductor 22, and the end surface of the insulator 32 moves forward toward the large diameter portion 26 of the conductor 22.
Stop inserting when the end face is reached.

Next, as shown in FIGS. 3 and 4, the presser metal fitting 27 is peeled off from the outside into a substantially hexagonal shape using a jig.

When the presser metal fitting 27 is crimped, the uneven portion 28 provided thereon bites into the outer sheath 34 of the coaxial cable 20 and at the same time is pressed by the uneven portion 26 of the outer conductor 22 to securely hold the coaxial cable 20 in that position. .

In the above description, a case has been described in which the presser fitting is peeled off in a hexagonal shape, but the present invention is not limited to this, and any shape may be used as long as it is a quadrilateral, hexagonal or other polygonal shape.

As detailed above, according to the present invention, the coaxial cable 20
The coaxial cable is securely held by the concave and convex portions 26 and 28 of the conductor 22 and the holding fitting 27, so there is no risk of it coming off the connector plug 20. Also, since the holding fitting 27 is caulked into a polygonal shape from the outside, the coaxial cable There is no risk of it rotating.

Therefore, the connection of the coaxial cable is maintained in good condition even after long-term use.

Furthermore, in the present invention, nuts 21. Since the conductor 22 and the holding fitting 27 are integrally formed, it is easy to attach the coaxial cable, and the appearance after attachment is clean, which has significant practical effects.

[Brief explanation of the drawing]

Figure 1a is a central sectional view of an example of a conventional connector plug;
b is a side view, FIG. 2a is a central sectional view of the embodiment of the present invention, b is a side view thereof, FIG. 3 is a central sectional view of the embodiment of the invention showing the coaxial cable attached state, and FIG. The AA sectional view, FIG. 5, is a sectional view of an example of the coaxial cable. 21: Connection nut, 22: Conductor, 26: Helical uneven portion, 27: Holder metal fitting, 28: uneven portion, 30: Coaxial cable.

Claims (1)

[Claims for Utility Model Registration] A connecting nut, a cylindrical conductor having one end fixed to the connecting nut and a spiral unevenness formed on the other outer peripheral surface, and a cylindrical conductor having one end fixed to the conductor. The other inner circumferential surface each includes a cylindrical presser metal fitting having a concavity and convexity formed opposite to the spiral concave and convex portion, and between the spiral concave and convex portion and the concave and convex portion opposing thereto. In this case, a gap is formed into which the outer conductor and jacket of the coaxial cable are inserted, and the outer part of the holding fitting corresponding to the uneven part is pressed into a polygonal shape after the coaxial cable is inserted, and the coaxial cable is attached. A connector plug for coaxial cables.